The layout of my phone's voice message system.

phone.txt

To listen to your messages, press 1.
To send a message, press 2.
To change your personal options, press 4.
> Personal options.
  To turn message waiting indicator on or off, press 1.
  - Message waiting indicator on.
    To turn message waiting indicator off, press 2.
    > Message waiting indicator now off.
    : Personal options.
    To exit, press *.
    >:Personal options.
  - Message waiting indicator off.
    To turn message waiting indicator on, press 1.
    > Message waiting indicator now on.
    : Personal options.
    To exit, press *.
    >:Personal options.
  To change administrative options, press 2.
  > Administrative options.
    To establish or change general options, press 1.
    > General options.
      To change password, press 1.
      To establish or change group distribution lists, press 2.
      > Group distribution lists.
        To create a group distribution list, press 1.
        > The new group distribution list number is: 1.
        To edit a list, press 2.
        To delete a list, press 3
        For names of the group list, press 4.
        To exit, press *.
        >:Personal options.
      To change the language, press 5.
      To turn autoplay on or off, press 6.
      - Autoplay on.
        To turn autoplay off, press 2.
          <untested, assumed to work like message waiting indicator>
      To turn callback number prompt on or off, press 7.
      To change prompt level, press 8.
      - You are currently using standard prompt.
        To use rapid prompt, press 2.
        To exit, press *.
    To establish or change message review options, press 4.
    > To change the order of messages in your mailbox, press 1.
      To control envelope information, press 2.
    ? To change envelope information, press 3. (only when new messages present)
    To exit, press *.
    : Personal options.
  To record greetings, press 3.
  For pager notification settings, press 4.
  > Your pager number is not defined. Please call customer care for assistance.
  : Personal options.
  To exit, press *.
To disconnect, press *.
...
> Unfortunately, the system cannot process your entry. Please try again later. Goodbye!